# Coldstar

> Open-source, air-gapped signing infrastructure for Solana. Any USB drive becomes a cold wallet — keys are encrypted with AES-256-GCM, decrypted only in volatile memory during offline signing, and never touch a networked machine. Built by Chainlabs Technologies (UK). No proprietary hardware: a $10 USB drive replaces a $200 signing device.

## What Coldstar is

- A CLI cold-wallet toolkit (`pip install coldstar`, cross-platform: macOS, Linux, Windows) and a mobile app for the Solana Seeker, published on the Solana dApp Store.
- Signing model: build the transaction online, transfer via QR to an air-gapped device, sign offline, broadcast the signed transaction. The private key exists in RAM only for the duration of signing.
- One workflow (flash, sign, broadcast) across the spectrum: personal wallets, DAO and fund treasuries, and autonomous agents (agent-safe signing with policy controls).
- Open source, in contrast to closed/proprietary hardware-wallet vendors.
- Features include Seed Vault integration on Seeker, multi-sig, DAO governance with Voter Stake Registry, and Jupiter swap support.

## Facts

- Developer: Chainlabs Technologies (UK). Website license: Purple Squirrel Media LLC.
- Fee model: 1% transaction fee capped at $10.
- Chain: Solana mainnet-beta (core is chain-agnostic; EVM support exists).

## Links

- Homepage: https://coldstar.dev/
- Docs: https://coldstar.dev/docs
- GitHub (CLI): https://github.com/devsyrem/coldstar
- X: https://x.com/buildcoldstar
- Terms: https://coldstar.dev/terms
- Privacy: https://coldstar.dev/privacy
- Seeker app terms: https://coldstar.dev/seeker-terms
- Seeker app privacy: https://coldstar.dev/seeker-privacy